/*
 * Copyright (C) 2015 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "config.h"
#include "AttributeDOMTokenList.h"

#include <wtf/TemporaryChange.h>

namespace WebCore {

AttributeDOMTokenList::AttributeDOMTokenList(Element& element, const QualifiedName& attributeName)
    : m_element(element)
    , m_attributeName(attributeName)
{
    setValueInternal(m_element.getAttribute(m_attributeName));
}

void AttributeDOMTokenList::attributeValueChanged(const AtomicString& newValue)
{
    // Do not reset the DOMTokenList value if the attribute value was changed by us.
    if (m_isUpdatingAttributeValue)
        return;

    setValueInternal(newValue);
}

void AttributeDOMTokenList::updateAfterTokenChange()
{
    DOMTokenList::updateAfterTokenChange();

    TemporaryChange<bool> inAttributeUpdate(m_isUpdatingAttributeValue, true);
    m_element.setAttribute(m_attributeName, value());
}

} // namespace WebCore
